Everybuddy Java (EBJava) is a messaging system written in Java. It consists of an applet and a server, and it can be used to log in to existing messaging services, such as AIM or ICQ, through a unified interface. User settings are also stored on the server, allowing access to contact lists from anywhere in the world.
I mean seriously, no offense but this article completely failed to live up to its potential. I mean, objective (if not significant) comparison of server side spam filtering implementations? Great!
But not only did this one not cover many systems, the ones it did cover weren't explored in a meaningful way even in terms of this guy's specific case.
Next time use procmail (or whatever) to feed the same messages to each of the filtering systems and let the whole thing run for two weeks. THEN there will be something approaching worthy of the tshirt.